Avatar: The Game was heavily optimized for DirectX 9 and DirectX 10. Modern systems running DirectX 12 occasionally misinterpret the legacy rendering pipelines.
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During the game’s active support period, Ubisoft provided a manual offline activation file. This remains the cleanest method. Avatar: The Game was heavily optimized for DirectX
Download and install the DirectX End-User Runtimes (June 2010) package directly from Microsoft’s official archives. This installs historical libraries alongside your modern DirectX installation without overwriting anything. Final Thoughts on Preservation James Cameron 39-s Avatar The Game Offline Activation
If you'd like to narrow down these steps for your specific setup, tell me: